I installed a new fuel pump relay in my 84 928S. It fixed my startup problem (It wouldn't start, but it turned over like a champ). Now I have dashboard Gremlins. The warning lights (ALL the red ones) flicker on and off.

Could I have loosened a wire near the fuse/relay box while looking for loose wires? All the fuses are good; I cheked them a number of times. Has anyone had this happen to them?

 

Go back to the central power panel, and tighten all of the ground connections just above the main panel. You can also carefully check and tighten the power connections on the top of the panel, but be VERY careful about causing a short circuit. It would be safer to disconnect the battery ground strap before doing all of this.